Stella McCartney's new eco-friendly sunglasses line for spring/summer 2012 is the result of extensive research and a commitment to reducing waste and supporting sustainability. Each pair is made with at least 50% natural and renewable materials.

The Etta bag shown here is gorgeous in an earthy shade of khaki and features antique brass hardware, vegan leather knot details, and tonal stitching for added interest and character.

These glasses (plus eight other styles) are made of one of the most abundant and renewable resources on the planet: human hair.